[Bug bootstrap/96203] LTO bootstrap with --enable-cet is broken

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96203

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |doko at gcc dot gnu.org,
                   |                            |hjl at gcc dot gnu.org

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
So we link CET enabled libiberty but do not build GCC itself (and thus gen*)
CET enabled which blows up with

commit 6a48d12475cdb7375b98277f8bc089715feeeafe
Author: Matthias Klose <doko@ubuntu.com>
Date:   Tue Jul 14 10:12:08 2020 +0200

    LTO: pick up -fcf-protection flag for the link step

    2020-07-14  Matthias Klose  <doko@ubuntu.com>

            PR lto/95604
            * lto-wrapper.c (merge_and_complain): Add decoded options as
parameter,
            error on different values for -fcf-protection.
            (append_compiler_options): Pass -fcf-protection option.
            (find_and_merge_options): Add decoded options as parameter,
            pass decoded_options to merge_and_complain.
            (run_gcc): Pass decoded options to find_and_merge_options.
            * lto-opts.c (lto_write_options): Pass -fcf-protection option.